Impression control for cutting and creasing presses



Jan. 4, 1938.

4 sheets-sheet 1 Filed March 30, 1937 Jan. 4, 1938. 2,104,527

IMPRESSION CONTROL FOR CUTTING AND CREASING PRESSES L. F. REMINGTON Filed March 30, 1957 4 Sheets-Sheet 2 Jail. 4, 1938.

L. F. REMINGTON IMPRESSION CONTROL FOR CUTTING AND CREASING PRESSES Filed March 50, 1937 4 Sheets-Sheet 3 Y R S1 Jan. 4, 1938. F. REMINGTON 1 5 IMPRESSION CONTROL FOR CUTTING AND CREASING PRESSES Filed March so; 1957 4 Sheets-Sheet 4 Patented Jan. 4, 1938 PATENT OFFICE EMFRESSION CONTROL FOR CUTTING AND CREASING PRESSES Leonard F. Remington,

to Thomson-National Press (70.,

Franklin, Mass., assignor Franklin,

Mesa, a corporation of Delaware application March 30,

' isolaiins.

My invention relates'to cutting and creasing presses, and particularly to means for controlling the impression. My invention is particularly adapted for use in connection with the so called Thomson type of cutting and creasing press.

In presses of this character, it is necessary to adjust the impression according to the character of the paper and its thickness. It is also essential that the impression may be thrown off instantly in case a sheet becomes misplaced, and also in the preliminary make ready, and this must be done at times without stopping the driving mechanism of the press. As the different paper used varies both in thickness and density according to the specifications in the particular case,

it is necessary to adjust the impression to the particular conditions, whichrequires'means for finely adjusting the relation of the bridge face and the form in use.

One object of my invention is to provide means for minutely varying the pressure of the bridge face on the form when the preliminary set up is made.

A second object is to provide improved throw off means, operative without stopping the operation of the press mechanism.

A further object is to combine throw off and braking means operative simultaneously.

Another object is to provide such a press with means for restoring automatically the impression conditions after throwing off.

Another object is to provide means for retaining the throw off means operative in succeeding cycles without further attention of the operator.

My invention consists in the novel combination of elements and the coordination of their operation, to accomplish the foregoing objects.

In the accompanying specification and the drawings forming a part thereof, Ihave described and illustrated a preferred embodiment of my invention as applied toa commercial cutting and creasing press, together with modifications, but I do not confine myself to these disclosures as other 1 modifications may be made without departing from the scope of the appended claims.

In the drawings,

Fig. 1 is a perspective drawing of a typical cutting and creasing press,- in which my invention is embodied.

Fig. 2 is an enlarged fragment of a similar press showing particularly the application of my invention, the several members-being in position for operation of the press. i

Figs. 3'and 4.- are respectively sectional plans on ,t--3, Fig. 5 and 4-4, Fig. 6.

1937, Serial No. 133,839

Fig. 5 is a section on line 5-5, Fig. 3.

Fig. 6 is a section on line 6-6, Fig. 4.

Fig. '7 is an elevation similar to that shown in Fig. 2, the throw off mechanism being in operation.

Fig. 8 is a similar elevation showing the means employed for retaining the throw off mechanism operative in repeated cycles of operation of the press.

Fig. 9 shows a fragmentary plan of such means.

Fig. 10 is an elevation similar to Fig. 2 showing one modification of the throw off.

Fig. 11 is an elevation similar to Fig. 7 showing the modified throw off means in operation.

Figs. 12 and 13 are similar views to Figs. 10 and 11, showing another modification.

The means for adjusting the impression shown in Figs. 1, 2, 4, 5, 6, are omitted on the other drawings for simplification, together with some other details not essential to the explanation of the particular figure.

In the drawings,

Referring particularly to Fig. 1, Ill is the base of a creasing and cutting press having the bed ll. I2 is the chase in which the form is made up; l3 being clamps for locking the made up form to the press bed, in operative relation to the platen 40, hereinafter referred to as the bridge face.

The bridge I4 is oscillated through the medium of the pitmans l5 journaled at one end 44 eecentric to the axis of the gear l5, rotated through the medium of the pinion I1, and the pulley l8 from a source of power. I9 is a balance wheel, on the periphery of which, the brake shoe operates. 2| is a treadle adapted through connections hereinafter described, to operate the throw off mechanism, and 22 an independent treadle adapted to simultaneously operate the throw off mechanism and the braking action. Referring to Figs. 2 to 6, in the bridge 14, is journaled the shaft 25, having projecting trunnions On these trunnions are journaled the arms 21, rigidly connected by the impression bar 28, Fig. 1,

Projecting inwardly from each arm is a hub 29,

the axes of which are eccentric with the axis of i the trunnions. On these hubs are journaled the other ends of the respective pitmans I5, and the function of these arms will be presently described.

Collars 30 secured to the end of the trunnions limit the axial movement of the arms in one direction andthe eccentricity of the trunnions relative to the shaft 25, limit their movement in the other direction, a shoulder being thus formed.

Rigidly secured to the shaft 25 on one side of the press and within the arm 21, is a worm gear 3 I, engaged by the worm 32, rotatable in the bracket 33 rigidly secured to the bridge |4.

On the other side of the bridge, and secured in similar manner to the shaft 25, is the element 35, having the slot 36, concentric with the axis of the shaft. Through this slot and tapped into the bridge, is the stud 31, a nut 38 operating to clamp the slotted element to the bridge thus locking the shaft 25 in adjusted position. When making up, the clamp nut is loosened, and the worm 32, is rotated by means of the head 39.

As the axes of the trunnions are eccentric to the axis of the shaft 25, they are rotated about that axis and the trunnions rotate within the hubs 28 of the arms 21. The pitmans l5 being journaled on these hubs, the rotation of the trunnions about the axis of the shaft 25, operates to advance or retract the face of the bridge relative to the form Without changing the relation of the journals of respective pitmans, but varying the relation of the face of the bridge thereto. It will be evident that with the mechanism' described, that the face of the bridge may be micrometrically adjusted relative to the form, and the impression increased or diminished minutely or materially, according to the amplitude of the angle through which the worm gear is rotated by the worm. The clamp nut 38 may now be tightened and in combination with the gear engagement with the worm on the other side of the press, the shaft is locked in adjusted position, and a uniform impression is assured in successive cycles of operation of the press.

In cases of emergency, and in making up at the beginning of a run, it is essential that means be provided for instant release of the impression, and I have provided improved means for this purpose, which may be operated without stopping the press, or may be operated to apply the brake simultaneously to quickly stop the rotation of the main shaft of the press.

Referring to Figs. 1, 2, 7, 8, I provide means for releasing the impression, hereinafter referred to as the throw 01f mechanism, which I will now describe.

The arms 21 are journaled on respective trunnions 26, and may be rotated by the means to be described. As the mechanism in the main is in duplicate, it will be described as applying to one side only as shown in the several figures, exceptions being specifically noted.

As hereinbefore noted, the hub 29, of the arm 27 is eccentric with the axis of the trunnion 26, on which it is journaled, and the pitman I5 is journaled at one end on thehub, the eccentricity being in such relation to the axis of the trunnion that the face 40 of the bridge will press the form when the arm 21 is in normal impression relation to the form, and the stud 44 projecting from the face of the gear l6, and on which the other end of the pitman is journaled, is on the back dead center. It will be obvious that if the arm is rotated in the direction of the arrow, Fig. 2, the relation of the axis of the hub 29 relative to the face 40 of the bridge, will be changed and the bridge retracted from the face of the form, without interrupting the continuous cycle of press operation.

In the preferred embodiment of my invention, the throw off means include the arm 45, bearing on the shaft 46, journaled on either side of the press in a bracket 41, rigid with the press frame I0. To the upper end of the arm is swiveled one end of the pitman 49, the other end being swiveled at 50 to a stud projecting from the arm 21. At 5| on the arm 45 is swiveled one end of the link 52, the other end being swiveled at 53 to one arm 54 of the bell crank journaled on the stud 55 projecting from the press frame. To the other arm 56 of the bell crank, is swiveled at 51, the pitman 58, the other end of which is swiveled at 59 to one arm 60 of a lever 6| rigid with the shaft 46, the other arm extending forward as at 6|, and having the lug 62 formed at its outer end.

Rigid with this lug and extending across the press to engage with the corresponding lug on the other side of the press, is the shaft 63, Fig. 1, and on this shaft is journaled the arms 64 of the treadle 2|. Below this shaft and journaled in the lugs is a second connecting shaft 66, rigid with which are the arms 61 of the second treadle 22, the function of which will be presently explained. The arms 64 are adapted to engage the periphery of the shaft 66, limiting the relative downward movement of the treadle 2|, rotatable in the other direction for the reason to be presently explained.

Slidable in the bearings |6'|| on either side of the press is a bolt 12, the end 13 contiguous to the arm 2! being beveled to engage corresponding bevels formed in the impression bar 28. When disengaged from the bar, these bolts are retracted by springs 14 to engage stop pins 15 with bearings 7|.

When the press is in operation, the bar 28 engages the bolts 72 as the face 40 of the bridge approaches the form, and the bolts are moved forward by the impression bar, engaging the ends 16 with the chase on either side of the press, operating to cushion the impact of the bridge with the form. Referring again to the throw off mechanism, when the treadle 2| is depressed, the arms 21, connected by the impression bar, are rotated through the intermediate means described, and the several members are moved to the position shown in Fig. 7, if the bridge is in impression relation to the form. In Fig. 2 I have indicated in broken lines the relation of the throw 01f mechanism and the bridge in open position, the throw off being inoperative, and in Fig. 7 similarly the relative positions when the throw off is in operation. When the treadle 2| is in the position shown in Figs. 1 and 2, the bearings of the link 52 are aligned with the axis of the stud 55 of the bell crank arm 54 locking the arm 45 by toggle action against swinging and as the bridge is swung to open position, the arms 21 are swung under the control of the links 49, the arm 45 remaining stationary. When the treadle 2| is depressed, the arms 2'! are rotated on their journals, to retract the bridge, engaging as the cycle proceeds with the bumpers 84. These bumpers comprise the shank 8| threaded to engage adjustably, corresponding tapped holes in the shoulders 82 formed on the bridge. Integral with the shanks are the heads 83 to which are secured the yielding pad 84 preferably formed from pliable rubber.

These bumpers limit the'rotation of the arms 21, and in the case that the throw off is not operative, operate as means for restoring the arms to impression position, automatically when the treadle is released, the counterweight 85 rigid with the shaft 46, operating to restore the treadle. to initial position and the alignment of the swivel centers 5|, 53, 55. The impression will thus be resumed in. the ensuing cycle. It is often advisable to have the throw off act during two or more cycles and I therefore provide means for arresting continuous impression. Secured to the press frame is the abutment 90, Figs. 1, 8, 9, and sli-dable axially on the shafts 62, 66 is the element QI, having a projection against Which the foot may press to, slide the element either way. Axially slidable in ears formed on the element, is a plunger 93 yieldingly pressed upwardly by the spring 9d, such upward movement being limited by the collar 95. Secured to the shaft 62 is a collar 96, so positioned relative to the abutment 9% on the frame, that the plunger 93 will engage therewith and limit the upward movement of the treadle 2i, when the element 9I is in contact with the collar.

When this condition obtains, the arm 21: is not returned to initial position and the hubs on which the pitrnans I5 are journaled are rotated sufficiently to prevent impression in successive cycles, as shown in Fig. 8. In the foregoing description the throw off elements are adapted to throw off the impression without stopping the press, and cooperating with this mechanism is other mechanism, on one side of the press, together with a separate treadle 22, by means of which the throw off may be operated, and simultaneously a brake applied to the balance wheel, to stop the press quickly.

The arms til of the treadle 22 are rigid with the shaft 56 journaled in the lugs 62, of the levers 6i. Rigid with the outer end of the shaft 66 is an arm IIlI, to which is swiveled at m, the pitman I03, the other end it being swiveled to one arm I05 of a bell crank journaled at I06 to the bracket M. swiveled to the arm I05 is a brake shoe 2d, adapted to engage the periphery of the balance wheel I9. The other arm of the bellcrank is formed with a counterweight IGQ, adapted to retain the shoe in normally withdrawn position, the abutment IIII projecting from the bracket d'l limiting the with-- drawn position of the brake shoe. The treadle 22 through the intermediate connections described, is normally retained in raised position as shown in Figs. 1, 2, and when the treadle ZI is depressed, the action of the counterweight I99 operates to retain the brake'shoe in withdrawn position, the shaft 56 rotating as the treadle 2i swings the arms 8i, the treadle assuming the relation shown in Fig. '7 as the shaft 563 rotates counterclockwise. When, however the treadle 22 is depressed, the shaft is first rotated, op erating through the arm WI and the pitman I03, to engage the brake shoe 28 with the periphery of the balance wheel I9, further depression of the treadle 22 operating the throw off mechanism in the manner described as applying to the treadle 2|. The brake shoe is positioned in operative relation to the periphery of the balance wheel, and the journal of the bell crank is positioned accordingly, on the bracket ii, in varying relation to the shaft 46, and without prejudice to other mechanism, coordinating therewith to function in the manner described.

In Figs. 10-11, I have shown one modification of my invention, and in Figs. 12, 13 a second modification, both in impression and in throw off position in respective figures, elements corresponding with the preferred embodiment being designated in respective modifications by the indices 0. and b.

In the first modification, the pitman 58a is swiveled to thetreadle lever not shown, and at 51a to the lever 5M, rigid with the stub shaft 55a,

journaled in the press frame, and to'which is rigidly secured, the lever 54a, the link 52a being swiveled thereto and to the element I25, journaled on the stud I26, inwardly projecting from the press frame. On this element is rotatably mounted the roll IZ'I. Rigid with the shaft I28 journaled in the bridge, is the lever 45a having an extension I29 projecting into the path of movement of the roll E21, when the treadle is pressed and the element is swung on its stud.

A link I30 is swiveled at one end to the lever 45a, and at the other end to an element I3i swiveled at I32 to the bridge.

Swiveled to the element I3i is a link 49a, its other end being swiveled to the arm 22a formed with a hub, corresponding with the arm 2? and the hub 29 in the preferred form. These connections are duplicated on the other side of the press and on depressing either treadle, the same action will take place as in the preferred embodiment. Mounted on the press frame It at Illa is the rotatable roll I35 intersecting the path of movement of the projection E29 of the lever 45a when the throw off mechanism has been operated. This roll functions to restore the throw off mechanism to impression position, as the bridge reaches its open position.

In the second modification, the pitman 58b is similarly connected to the treadle arm and at one end 5119 to the lever 56b swiveled at 5% to the frame of the press. In this type of press, as the bridge starts to open, it has two movements, first moving outward an initial distance normal to the form, the lugs I152, 553 and the friction roll I50, journaled on an inwardly projecting stud from the bridge, thus preserving alignment. This roll bears on the rail i5! on which the lug I52 also bears, and when the bridge is moved from the form sufficiently to release the engagement of the lugs with the rail, the bridge rolls open on the arcuate member I54 integral with the bridge. In this modification, when the bridge has moved through this initial distance, either treadle may be pressed, and the end I-iii of the lever 54b will intersect the path of movement of the roll I4I, journaleol at I42 to an extension I43 of the lever 45b, swiveled to the bridge at I44, as the bridge continues its open ing movement. To the upper end of the lever 4519 at 48?), is swiveled one end of the link 49, the other end of which is swiveled to the arm 2? as in the preferred embodiment. Rotatably mounted on the lever 45b is the roll M5. The pitman I5 is formed with the projection I45, on which is rotatably mounted the roll I47. As the bridge rolls to open position, the roll it? moves to the position shown in broken lines, Fig. 12 and engages the roll I45, operating to restore the several elements to normal impression relation if the throw off has been previously operated. It will be obvious that the treadle 2| must be depressed to operate the throw off for a succeeding impres sion after the bridge has started to close, and

the roll I41 has passed the point of intersection of the path of movement of the roil E45, and equally obvious that the parts will be restored to normal position as the rolls engage, the lever 45b engaging the stop I45 on the bridge as the bridge reaches open position.

In Figs. 2 and '7 I have indicated the open position of the bridge in broken lines.

As hereinbefo-re stated, the treadle 2i may move contraclockwise, the reason for this construction being to obviate the interference with should be an obstruction beneath the treadle 2|, by accident.

Having thus described my invention, I claim:-

1. In a cutting and creasing press having a rigid bed, a bridge, trunnions projecting therefrom, pitmans connecting the bridge with power means to oscillate the bridge relative to the bed, elements journaled on respective trunnions formed with hubs axially eccentric to the trunnions and constituting journals for respective pitmans, means for rocking the elements relative to the trunnions to retract the face of the bridge relative to the axes of the hubs, comprising a bell crank swiveled to either side of the press; a pitman swiveled to each bell crank and to a treadle; corresponding rocker levers rotatably mounted on the press, and having swiveled connections to the respective bell cranks, and the arms of the eccentric elements, whereby the elements will be rocked when the treadle is pressed, and said elements will be retained in impression relation to the bridge when the treadle is in normal position. v

2. In a cutting and creasing press having a rigid bed, a bridge, trunnions projecting therefrom, pitmans connecting the bridge with power means to oscillate the bridge relative to the bed, elements journaled on respective trunnions formed with hubs axially eccentric to the trunnions and constituting journals for respective pitmans, means for rocking the elements relative to the trunnions to retract the face of the bridge relative to the axes of the hubs, comprising a bell crank swiveled to either side of the press; a pitman swiveled to each bell crank; a treadle, to which the pitmans are swiveled; corresponding rocker levers journaled on a shaft journaled on either side of the press and to which the treadle is rigidly secured; a pitman connecting each rocker lever with the arm of respective eccentric elements; and a pitman swiveled to each rocker lever and corresponding bell crank, whereby the eccentric elements will be rocked when the treadle is depressed and said elements will be retained in impression relation to the bridge when the treadle is in normal position for operating the press.

'3. In a cutting and creasing press of the character described in claim 2, the swivel centers of the pitmans connecting the bell cranks and the rocker levers being adapted to align with the centers of rotation of the bell cranks, and in such relation, to lock the respective eccentric elements in impression relation to the bridge.

4. In a cutting and creasing press of the character described in claim 1, the means for rocking the eccentric elements being operative, when the treadle is depressed, to restore them to normal impression relation to the bridge when the pressure on the treadle is released.

5. In a cutting and creasing press of the character described in claim 2 in which the treadle comprises a pair of arms secured to said shaft on either side of the press; a rigid shaft connecting the outer ends of said arms; arms swiveled thereon and connected by a rigid pressure plate and adapted to swing upwardly from a normal operative relation to the arms.

6. In a cutting and creasing press of the character described in claim 1, means for limiting the rotation of thesaid eccentric elements including a rigid connection between the elements; an adjustable bumper on either side of the bridge, adapted to engage said rigid connection,

2,104,527 the operation of the treadle 22, in case there' and to restore the said'eccent'ric elements to normal relation with the bridge for a succeeding impression.

7. In a cutting and creasing press of the character described in claim 2 in which the treadle includes a pair of arms secured to said shaft on either side of the press; a rigid shaft connecting the outer ends of said arms; a shaft journaled in the arms adjacent to the rigid shaft; arms rigid with the latter journaled shaft and. c0nnected by a rigid plate to constitute a second treadle; a crank arm rigid with the journaled shaft; a lever suitably mounted to swivel adjacent to the balance wheel; a brake shoe swiveled to said lever and adapted to engage the periphery of said wheel; connections between the crank arm and lever whereby the crank arm will be oscillated to engage the shoe with the wheel when the second treadle is pressed.

8. In a cutting and creasing press having a rigid bed, a bridge, trunnions projecting therefrom, pitmans connecting the bridge with power means to oscillate the bridge relative to the bed, elements journaled on respective trunnions formed with hubs axially eccentric to the trunnions and constituting journals for respective pitmans, means for rocking the elements relative to the axes of the hubs, including a pair of treadle levers, a connecting shaft to which the levers are rigidly secured, journaled on either side of the press frame; an enlarged portion at the outer end of each lever; a connecting shaft rigid with said enlargements; a shaft journaled in said enlargements adjacent to the rigid shaft; a pair of arms journaled on the rigid shaft and rigidly connected by means of a treadle plate, said arms being limited in downward rotation by the journaled shaft; a pair of arms rigid with said shaft and connected by means of a second treadle plate; a crank rigid with the journaled shaft; a brake shoe mounted in operative relation to the balance wheel; connections between the brake shoe and the crank; swiveled connections between the treadle levers and the cocentric elements journaled on the trunnions projecting from the bridge, whereby the said elements may be rotated to throw off the impression when either treadle is depressed.

9. In a cutting and creasing press of the character described in claim 8, the first named treadle being operative to throw off the impression without applying the brake shoe to the balance wheel, and the second treadle being operative to throw off the impression when depressed and simultaneously engage the brake shoe with the bal ance wheel of the press.

10. In a cutting and creasing press of the character described in claim 8, the first named treadle being operative to throw oif the impression without applying the brake shoe to the balance wheel, and the second treadle being operative to throw off the impression when depressed and simultaneously engage the brake shoe with the balance wheel of the press; and. means for retaining the brake shoe in withdrawn position when the first treadle is depressed.

11. In a cutting and creasing press of the character described in claim 8, the brake shoe being swiveled in a lever journaled adjacent to the balance wheel; an extension from said lever formed with a counterweight; an abutment against which the lever is pressed normally by action of the counterweight; connections between the crank arm and the lever whereby the lever will be oscillated to engage the brake shoe with the balance wheel when the second treadle is depressed, the brake shoe and lever being adapted to retain withdrawn position when the first lever is depressed.

12. In a cutting and creasing press of the character described in claim 1, the means for rocking the eccentric elements being operative, when the treadle is depressed, to restore them to normal impression position; and means for interrupting such restoration after the treadle is released.

13. In a cutting and creasing press of the character described in claim 1, the means for rocking the eccentric elements being operative when the treadle is released, to restore them to normal impression position; and means for interrupting such restoration after the treadle is released, including an abutment projecting from the press; and a member mounted on the treadle and mov able to engage the abutment and prevent the return of the treadle to initial position and the eccentric elements to impression position.

14. In a press of the character described in claim 1, the means for rocking the eccentric elements being operative, when the treadle is depressed, to restore them to normal impression position, means for interrupting such restoration after the treadle is released, including an abutment projecting from the press base, and a member slidably mounted on the treadle adapted to engage the abutment and to prevent the return of the treadle and connected parts to normal position for impression.

15. In a cutting and creasing press of the character described in claim 1, the means for rocking the eccentric elements being operative when the treadle is released, to restore them to normal impression position; and means for interrupting such restoration after the treadle is released, including an abutment projecting from the press; and a member mounted on the treadle and movable to engage the abutment and prevent the return of the treadle to initial position and the eccentric elements to impression position, such member including a yieldingly supported plunger adapted to engage the abutment when the member is moved to align with the abutment.

16. In a cutting and creasing press of the character described in claim 1, and having a rigid connection between the eccentric elements, means for cushioning the impact of the bridge face and the form, including a pair of bolts slidaoly mounted on either side of the bridge, and yieldingly retracted from the face thereof, and formed with a bevel face on each, adapted to be engaged by the rigid connection between the eccentric elements, the other end of each bolt being formed to engage the chase of the form to insure uniform impact in successive cycles.

1?. In a cutting and creasing press of the character described in claim 1, means for limiting the rotation of the eccentric elements including an adjustable bumper mounted on either side 0 of the bridge and adapted to engage a rigid connection between the eccentric elements.

18. In a cutting and creasing press of the character described in claim 1, means for limiting the rotation of the eccentric elements including a bumper member threaded to engage projecting shoulders on the bridge; and a yielding element secured to the threaded member and adapted to engage a rigid connection between the eccentric elements.

LEONARD F. REMINGTON. 

